Blank cells , & cells with 0 in them

[DDD]

Formula in cell J10-

=IF(G10=0,"There are no more copies, please ask students to return their
books or buy more stock","")

I have entered this to J10 & used the fill column, so that the cells under
this have a similar formula (Not fixed). Everything works

But I just want that message to appear when there is a 0 in the cell (G10 or
any other cell underneath it)

Is there a way to not allow the message to appear, when the cell e.g. G10 is
BLANK , Not 0.

 

[Gary''s Student]

How about:

=IF((G10=0)*(G10<>""),"got a real zero","might have a blank")